CN103109657A - 'Jiang tian number one' stevia rebaudiana seeding cutting breeding method - Google Patents

Abstract

The invention discloses a 'jiang tian number one' stevia rebaudiana seeding cutting breeding method. The method is a preparation of seedbeds, a choice of cutting slips and cutting of autumn and spring. The seedbeds are leveled in cutting, bottom water is watered enough, and the cutting is conducted when soil relative water-holding capacity is above 80%. The cutting slips are inserted when the cutting slips are cut. A straight knife is used for pricking a deep minor groove with 2cm on seedbed surfaces in cutting, then the cutting slips are inserted into the groove, 1-2 pairs of blades are buried to enable the cutting slips to be in tight contact with soil, living water are watered immediately, thin films are covered, shading nets are covered additionally, temperature is kept and shine is avoided, and blade sections taking root under the soil is facilitated. Cutting density is controlled in row spacing with 1.5-2cm and line spacing 3-3.5cm. Temperature of the seedbeds after cutting is controlled within 20-28 DEG C and relative humidity is 80-90%. For the seedbeds of seeding leaf color exogrnous substancces, organic leaf fertilizer is sprayed directly around the noon in shiny days. The 'jiang tian number one' stevia rebaudiana seeding cutting breeding method is more suitable for 'jiang tian number one' stevia rebaudiana seeding vegetative propagation.

Description

A kind of " sweet No. 1 of river " stevia seedling cuttage seedling-breeding method

Technical field

The present invention relates to the agricultural methods of a kind of " sweet No. 1 of river " the numerous seedling of stevia seedling cuttage.

Background technology

Stevia in Jiangsu, there is plantation on the ground such as Anhui, Jiangxi, Xinjiang, field planting is mainly by kind of a transplantation of seedlings production.Stevia was planted more than 30 year by Dongtai City, Jiangsu Province, and cultivated area is more than 100,000 mu throughout the year." sweet No. 1 of river " is a kind of stevia new varieties of the autonomous seed selection in Dongtai City, Jiangsu Province, passed through the variety identification (Su Jian stevia 201201) of the Jiangsu Province Crop breed audit committee in 2012, this kind has that output is high, the characteristics of quality better, strong stress resistance, improves more than 30% than conventional output.For fast breeding " sweet No. 1 of river " stevia seedling, for establishing in large scale " sweet No. 1 of river " provides high-quality seedling source, we utilize " sweet No. 1 of river " tender cuttage to carry out Seedling asexually propagated, produce " sweet No. 1 of river " stevia seedling that a large amount of varietal purities are high, proterties is good, enlarge Dongtai City's stevia crops planting area, increased peasant's income.Fundamentally solve the problem of stevia new varieties " sweet No. 1 of river " seedling anxieties, accelerated " sweet No. 1 of river " and applied paces, increased substantially output and the quality of stevia, be conducive to promote the sound development of stevia new industry.

Summary of the invention

The object of the invention is to carry out the Seedling asexually propagated method by " sweet No. 1 of river " tender cuttage of stevia, both kept the feature of improved seeds, can realize again the Fast-propagation of seedling.

For achieving the above object, " sweet No. 1 of river " of the present invention numerous seedling technology of stevia cuttage, its feature comprises the following steps:

1. prepare in the seedbed: the seedbed is set up in the place that selection fertile soil, hidding and sunny side, water source are conveniently, physical features is higher, bed surface width 1.2-1.4 rice, select the material such as bamboo chip to build the arch form pony set on the seedbed, cover on support without dripping a plastic film Rainproof heat-insulation, and cover with sunshade net;

2. plugged ear is selected: when growing seedlings (Qiu Fanmiao) 8-10 month, plugged ear is directly from " sweet No. 1 of river " plant top, land for growing field crops clip; Winter, numerous seedling in spring plugged ear used, can be directly from the upper clip of Qiu Fanmiao, or from the insulation clip on the seedling that old root sprouts of surviving the winter, plugged ear 4-5 is to blade;

3. cutting time: with late August in autumn to by the end of October and 3-4 month in spring numerous seedling best;

4. cottage method: after the seedbed is smooth, water in right amount, make the relative water-holding capacity in field be not less than 80%.Plugged ear should be with cutting with inserting.First prick 2 centimetres of dark ditches with straight knife on the surface, seedbed during cuttage, then plugged ear is inserted in ditch, 1-2 buries to blade, and is real with soil pressure after inserting, make plugged ear and soil close contact, water immediately a foot water alive, cover film, add a cover again sunshade net, be incubated sun-proofly, impel the lower leaf segment of soil to take root;

5. cutting density: spacing in the rows 1.5-2 centimetre, line-spacing 3-3.5 centimetre;

6. seedbed management: in the seedbed after cuttage, temperature is controlled at 20-28 ℃, relative air humidity 80-90%.Autumn air temperature will in time cover after descending, and meets extreme low temperature weather (lower than-3 ℃), should add a cover insulation material again; When temperature in bed surpasses 30 ℃, by measure coolings such as the films that ventilates, takes off.After cuttage rooting, throw off sunshade net.To the seedling leaf look yellow seedbed that falls, can rest in fine weather and directly spray organic foliar fertilizer before midday.

Above invention technology has fundamentally solved the problem of " sweet No. 1 of river " seedling source deficiency, has greatly improved the proliferative speed of stevia seedling, has guaranteed varietal purity, has kept the good characteristic of kind.

Advantage of the present invention is:

1, the good characteristic and the varietal purity that have kept " sweet No. 1 of river " stevia kind.

2, accelerated " sweet No. 1 of river " numerous seedling speed, through autumn and spring constantly cutting the fringe cuttage, breeding rate reaches more than 30 times, can accelerate to apply speed, and promoting the transformation of scientific and technological achievements is productivity.

3, numerous seedling efficient and convenient, easy to learn can meeting, be convenient to popularization.

Embodiment

Below further illustrate the present invention by instantiation.

Example in early September, 1 2010, " sweet No. 1 of the river " stevia that kitchen range town turns round and look at Pie village peasant Zhang Chengguan plantation in Dongtai City, Jiangsu Province is set up 3800 square metres, seedbed in the land for growing field crops, 1.4 meters of bed surface width, and building side by side 3 is a unit.Select the bamboo chip material to build the arch form pony set on the seedbed, 1 meter of set spacing covers without a plastic film Rainproof heat-insulation on support, and covers with sunshade net.Water suitable quantity of water the previous day in cuttage, keep the relative water-holding capacity in field to be not less than 80%.Begin to carry out numerous seedling in autumn mid-September, the seedling top clip that plugged ear is sprouted after " sweet No. 1 of river " results directly from the land for growing field crops, varietal purity 100%, 4.5 pairs of blades of cutting length.First prick 2 centimetres of dark ditches during cuttage with straight knife on seedbed surface, then plugged ear is inserted in ditch, 1-2 buries to blade, and is real with soil pressure after inserting, and waters immediately a foot water of living, and cover film, then add a cover sunshade net be incubated sun-proofly, impels that under soil, leaf segment takes root.2 centimetres of spacing in the rows, 3.5 centimetres of line-spacings.In seedbed after cuttage, to be controlled at 20-28 ℃, relative moisture be 80-90% to temperature.Late October in time covers when below mercury dropped to 20 ℃.Late November, build 6 meters roomy canopies on 3 seedbeds side by side, cover 1 layer film and heat or be incubated.Begin apparent temperature rise situation March in next year and take off the film temperature adjustment.After cuttage 12 days, after cuttage rooting, throw off sunshade net.To stopping then numerous seedling on December 20.In late Febuary, 2011 begins to carry out numerous seedling in spring, and plugged ear to statistics on April 25, adds up numerous seedling 291.5 ten thousand strains from the upper clip of Qiu Fanmiao.Seedling purity 99.7%.During this period, temp. and humidity, numerous seedling of autumn in 2010 is sprayed 100 times of liquid of the organic foliage fertilizer of little molecule on March 20th, 2011 in controlling the seedbed, guarantee the healthy and strong growth of seedling.

Dongtai City, 2 years Jiangsu Province of example turns round and look at Pie village peasant Xia Zhenglin and carries out numerous seedling in spring in 6667 square metres of empty seedbeds reserving since late Febuary, from the upper clip skewer fringe of the Qiu Fanmiao of last year, cuttage and management method according to Qiu Fanmiao bred " sweet No. 1 of river " stevia seedling, to April 10, accumulative total was bred seedling 4,500,000 strains.

Claims (1)

1. the numerous seedling technology of stevia cuttage of the present invention, its feature comprises the following steps:

1. prepare in the seedbed: the seedbed is set up in the place that selection fertile soil, hidding and sunny side, water source are conveniently, physical features is higher, bed surface width 1.2-1.4 rice, select the material such as bamboo chip to build the arch form pony set on the seedbed, cover on support without dripping a plastic film Rainproof heat-insulation, and cover with sunshade net;

2. plugged ear is selected: when growing seedlings (Qiu Fanmiao) 8-10 month, plugged ear is directly from " sweet No. 1 of river " plant top, land for growing field crops clip; Winter, numerous seedling in spring plugged ear used, can be directly from the upper clip of Qiu Fanmiao, or from the insulation clip on the seedling that old root sprouts of surviving the winter, plugged ear 4-5 is to blade;

3. cutting time: with late August in autumn to by the end of October and 3-4 month in spring numerous seedling best;

4. cottage method: after the seedbed is smooth, water in right amount, make the relative water-holding capacity in field be not less than 80%.Plugged ear should be with cutting with inserting.First prick 2 centimetres of dark ditches with straight knife on the surface, seedbed during cuttage, then plugged ear is inserted in ditch, 1-2 buries to blade, and is real with soil pressure after inserting, make plugged ear and soil close contact, water immediately a foot water alive, cover film, add a cover again sunshade net, be incubated sun-proofly, impel the lower leaf segment of soil to take root;

5. cutting density: spacing in the rows 1.5-2 centimetre, line-spacing 3-3.5 centimetre;

6. seedbed management: in the seedbed after cuttage, temperature is controlled at 20-28 ℃, relative air humidity 80-90%.Autumn air temperature will in time cover after descending, and meets extreme low temperature weather (lower than-3 ℃), should add a cover insulation material again; When temperature in bed surpasses 30 ℃, by measure coolings such as the films that ventilates, takes off.After cuttage rooting, throw off sunshade net.To the seedling leaf look yellow seedbed that falls, can rest in fine weather and directly spray organic foliar fertilizer before midday.